Final answer:
The probability cannot be determined without additional data.
Step-by-step explanation:
To find the probability that the project can be completed within 9 hours, we need to know the total time it takes to complete the project and the probability distribution of completing it within various time intervals.
Since the question does not provide this information, we cannot determine the probability without additional data. Therefore, none of the given options (a, b, c, or d) can be selected as the answer.